<template>
  <div class="List" ref="wrapper">
      <div>
    <div class="area">
      <div class="title border-topbottom">当前城市</div>
    <div class="button-List">
        <div class="button-wrapper">
          <div class="button">{{this.$store.state.city}}</div>
        </div>
    </div>
    </div>
    <div class="area">
      <div class="title border-topbottom">热门城市</div>
    <div class="button-List">
      <div class="button-wrapper" v-for="item of hot"
        :key="item.id"
        @click="handleCityClick(item.name)">
          <div class="button">{{item.name}}</div>
        </div>
    </div>
    </div>
    <div class="area" 
    v-for="(item,key) of cities"
     :key="key"
     :ref="key">
      <div class="title border-topbottom">{{key}}</div>
      <div class="item-list">
      <div class="item border-bottom" v-for="innerItem of item" 
      :key="innerItem.id"
      @click="handleCityClick(innerItem.name)">
        {{innerItem.name}}
        </div>
  
      </div>
    </div>
  </div>
  </div>
</template>
<script>
import Bscroll from 'better-scroll'
export default {
  name: "CityList",
  props:{
    cities:Object,
    hot:Array,
    letter:String
  },
  mounted(){
     this.scroll=new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter (e) {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  methods:{
    handleCityClick(city){
      this.$store.dispatch('changeCity',city)
      this.$router.push('/')
    }
  }
};
</script>
<style lang="stylus" scoped>
@import '~styles/varibles.styl';
 .border-topbottom
     &:before
         border-color:#ccc   
     &:after
         border-color:#ccc     
.border-bottom
     &:before
         border-color:#ccc     
.List
    overflow:hidden
    position:absolute
    top:1.58rem
    left:0
    right:0
    bottom:0
 .title
    line-height: .54rem
    background: #eee
    padding-left: .2rem
    color: #666
    font-size: .26rem
 .button-List
     padding: .1rem .6rem .1rem .1rem
     overflow: hidden
 .button-wrapper
      float: left 
      width 33.33%   
    .button
        margin: .1rem 
        padding: .1rem 0
        text-align: center
        border: .02rem solid #ccc  
        border-radius: .06rem
   .item-list
       .item
           line-height: .76rem
           padding-left: .2rem     
</style>